Wash the green grapes thoroughly under cool running water, then remove the stems. Spread them in a single layer on a baking sheet and place them in the freezer for about 1 hour.

Once the grapes are fully frozen, take them out of the freezer. Gently twist off the grape stems and place the frozen grapes in a colander. Rinse them carefully with cool water to remove any frost.

Take your desired flavors of Kool-Aid mix and prepare several ziplock bags. Divide the rinsed grapes according to the flavors you've chosen.

Add the Kool-Aid mix into each ziplock bag with grapes, seal each bag tightly, and shake vigorously for about 30 seconds until the grapes are evenly coated.

Line a baking sheet with parchment paper. Spread out the coated grapes in a single layer on it for freezing.

Place the baking sheet with the coated grapes back in the freezer for an additional 24 hours to become firm and flavorful.